TY - GEN
T1 - Conditional random fields for Spanish named entity recognition using unsupervised features
AU - Copara, Jenny
AU - Ochoa, Jose
AU - Thorne, Camilo
AU - Glavăs, Goran
N1 - Publisher Copyright:
© Springer International Publishing AG 2016.
PY - 2016
Y1 - 2016
N2 - Unsupervised features based on word representations such as word embeddings and word collocations have shown to significantly improve supervised NER for English. In this work we investigate whether such unsupervised features can also boost supervised NER in Spanish. To do so, we use word representations and collocations as additional features in a linear chain Conditional Random Field (CRF) classifier. Experimental results (82.44% F-score on the CoNLL-2002 corpus) show that our approach is comparable to some state-of-art Deep Learning approaches for Spanish, in particular when using cross-lingual word representations.
AB - Unsupervised features based on word representations such as word embeddings and word collocations have shown to significantly improve supervised NER for English. In this work we investigate whether such unsupervised features can also boost supervised NER in Spanish. To do so, we use word representations and collocations as additional features in a linear chain Conditional Random Field (CRF) classifier. Experimental results (82.44% F-score on the CoNLL-2002 corpus) show that our approach is comparable to some state-of-art Deep Learning approaches for Spanish, in particular when using cross-lingual word representations.
KW - Collocations
KW - Conditional random fields
KW - NER for Spanish
KW - Word representations
UR - http://www.scopus.com/inward/record.url?scp=84994131732&partnerID=8YFLogxK
U2 - 10.1007/978-3-319-47955-2_15
DO - 10.1007/978-3-319-47955-2_15
M3 - Contribución a la conferencia
AN - SCOPUS:84994131732
SN - 9783319479545
T3 - Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
SP - 175
EP - 186
BT - Advances in Artificial Intelligence - IBERAMIA 2016 - 15th Ibero-American Conference on AI 2016, Proceedings
A2 - Escalante, Hugo Jair
A2 - Montes-y-Gomez, Manuel
A2 - Segura, Alberto
A2 - de Dios Murillo, Juan
PB - Springer Verlag
T2 - 15th Ibero-American Conference on Advances in Artificial Intelligence, IBERAMIA 2016
Y2 - 23 November 2016 through 25 November 2016
ER -